mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

AI-generated identification · may be incorrect

Hardness: 2.5–3 on Mohs scale; Color: Pink, lilac, purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal (micaceous sheets); Specific Gravity: 2.8–2.9

Hardness: 2
Color: Pink, lilac, purplish-gray
Luster: Vitreous to pearly

Identified July 14, 2026More mineral →

Explore Lepidolite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 2.5–3 on Mohs scale; Color: Pink, lilac, purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal (micaceous sheets); Specific Gravity: 2.8–2.9

Formation & geological history

Found primarily in lithium-bearing granite pegmatites. It forms from late-stage crystallization when lithium concentrations are high enough to precipitate lithium-rich minerals.

Uses & applications

Primary source of lithium metal for batteries and alloys; used in glass making to increase toughness; popular for ornamental carvings, beads, and metaphysical specimens.

Geological facts

It was originally called 'lilalite' because of its lavender color. It is common to find lepidolite associated with other minerals like tourmaline (rubellite), spodumene (kunzite), and quartz.

Field identification & locations

Identify by its distinctive lilac/purple color and micaceous habit (tendency to flake into thin, glittery scales). Often found in the Brazil, Madagascar, and the United States (Maine, California).